Normally, swelling of the feet in cancer patients can be caused by a variety of reasons, mostly considering the presence of hypoalbuminemia, venous thrombosis of the lower extremities, liver and kidney impairment, and cardiac insufficiency. Depending on the causes, the treatment varies. Common causes and treatment 1. Hypoalbuminemia: When the albumin in the blood is lower than 30g/L, bilateral foot swelling often occurs. If hypoalbumin is not corrected and further decline occurs, foot swelling can appear significantly worse and even cause edema of the entire thigh. The main treatment is supplemental albumin therapy. After supplementing albumin by intravenous drip, the normal albumin level can be gradually restored, and the swollen feet or legs will improve. 2. Lower limb vein thrombosis: If the foot swelling is mostly unilateral, it should be highly suspected that the lower limb vein thrombosis has occurred. If lower limb vein thrombosis can be detected, a consultation with vascular surgery is required and appropriate anticoagulant medication should be given. However, while administering anticoagulation treatment, special attention must be paid to the possibility that venous thrombosis of the lower extremities may dislodge and cause renal infarction, pulmonary infarction, myocardial infarction, cerebral infarction, etc. Special attention must also be paid to the patient’s bleeding tendency; 3. Liver and kidney function damage: It may also be due to the combination of liver and kidney function damage in cancer patients, resulting in swollen feet, which can be treated with diuretic and anti-swelling treatment; 4. Cardiac insufficiency. Cardiac insufficiency can also lead to swollen feet, mostly due to right heart failure, which can be clarified by cardiac ultrasound and electrocardiogram, and the swollen feet can be relieved after symptomatic treatment of heart disease. Attention Patients who have swollen feet need symptomatic treatment to reduce swelling with the help of doctors. In daily life, you can put your feet up while resting or sleeping in cancer patients, while applying hot compresses with towels to help relieve edema symptoms. Keep the diet light and eat less salty food.